Alarm device.



W. TRAPPORD.

ALARM DEVICE. APPLICATION FILED DEC. 6. 1905.

1,1 12,576. Patented 001;. '6, 1914.

2V4 meooeo 19 1 \UL'A Z Q l THE NORRlS P ETERS $0.. PHOTU-LITHO" WASHINGTON, u. 1.

UNITED STATES @FFKCE.

WESLEY TE-AFFORD, OF NEVT YQRK, N. Y.

ALARM DEVICE.

To (ZZZ whom it may concern Be it known that I, Vlnsnnrr Tnarronn, a citizen of the United States, residing at New York city, county of New York, and State of New York, have invented certain new and useful Improvements in Alarm De vices, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to a device whereby an alarm will be sounded when a door is opened.

The invention aims especially to provide a portable door alarm which may be readily attached to or detached from the door on which it is to be used and which after having been attached to the door so as to be on the inside or room side of the door may be set by the act of closin the door from the outside.

A full understanding of the invention can best be given by a detailed description of a preferred construction embodying the various features thereof, and such a description will now be given in connection with the accompanying drawings, in which:

Figure l is an elevation of the device looking toward one face of the supporting plate. Fig. 2 is an elevation looking in the direction of the arrow 2 of Fig. 1. Fig. 3 is a section on line 3 of Fig. 1 but showing the device as attached to a door. Fig. i is a view similar to Fig. 2, but showing the parts in a different position and with parts broken away. Fig. 0 of Fig. 2.

Referring to the drawings, 10 represents a supporting plate on which the alarm sounding device which is preferably an automatic or continuous-ring spring actuated bell and the various operative parts are mounted. A common form of automatic or self-ringing bell 11 is shown having a push piece 12 by the inward movement of which the spring actuated mechanism of the bell is released to cause a continuous ringing of the bell as long as the pressure is maintained on the push piece. The actuating spring of the bell is put under tension by turning the bell proper on its base portion 13. Bells of this kind are well known, and as the bell itself forms no part of the present invention and other suitable forms might be used, there is no necessity of a more detailed description or showing thereof.

In the construction shown for carrying is a section taken on line 5 Specification of Letters Eatent. Pat-grated flgtfi, 1914. Application filed. December 6, 1905.

Serial No. 299,517.

the invention into operation, the supporting plate is intended to be secured to an edge of the door so as to extend at right-angles from the inner face of the door, and for this pur-f pose that end of the supporting plate'lO which is to be attached to the door is provided with a terminal flange 1% for engaging the outer face of the door, and a slide 16 is mounted on the supporting plate 10 having a flange 17 adapted to engage the inner face of the door. The flanges 14 and 17 are preferably provided with holding pins 18 as shown. The slide 16 is mounted on the support 10 so as to have sufficient movement to accommodate doors of different thicknesses between the holding flanges l4 and 17 and is secured in position by means of a thumb nut 19 when it has been moved to force the flange 17 against the door, which thumb nut screws on a screw stud 2O extendingfrom the supporting plate 10 through a slot in the slide 16. In order that the flange 17 may be readily pressed against the door 21 with sufficient force to properly secure the device to the door, the de ice is preferably provided with an eccentric 22 having an operating handle 23 and pivotally secured to the support 10 so as to bear against the flanged end of an extension of the slide 16. By swinging the handle of the eccentric in the direc tion of the arrow in Fig. .1, the slide 16 and holding flange 17 may be moved to the right from the retracted position shown in Figs. 1 and 2 for forcing the holding flange 17 against the door, as shown in Fig. 3.

For operating the push piece 12 of the bell, anoperating lever 25 formed preferably of a plate bent to the form shown is secured to the supporting plate'lO so as to havea limited oscillating movement, as by means of cars 26 extending throughsuitable openings in the plate 10. The short arm 27 of the lever 25 extends up adjacent to the push piece 12, and the long arm 28 extends substantially parallel with the plate 10, and a spring 30 engaging the under side of the arm 28 of the lever tends to oscillate the lever so as to cause the short arm to force the push piece 12 of the vbellin ward, thereby setting the bell in operation. To prevent such operative movement of the lever 25 two holding devices are provided. One of these holding devices is formed by a pivoted stop 31 mounted on the supporting plate 10 in position so that it may be turned to extend over the edge of the arm 28 of the operating lever and thereby prevent move-- ment of the lever under the action of the spring and the consequent ringing of the bell. The other holding device is formed by a finger 35 secured at its outer end to the supporting plate 10 and having its inner endextending over the end of the arm 25 of the operating lever and normally standing out of engagement as shown in Fig. 2. This holding finger 35 is preferably formed by being cut. from the body of: the supporting plate 10as shown, and bent slightly so as to form a spring finger normally stand ing in the inoperative position shown in Fig. 2, and which when pressed toward the sup porting plate 10 will engage the end ot the arm 28 of the operating lever and thereby revent operative movement oit such lever. lVhen pressed into operative posit-ion the end of the finger will engage a cam face 36 on the stop 31, and will thereby throw the stop out of engagement with the lever arm 28 so that the lever arm will then be held in its retracted or inoperative position solely by the holding finger 85.

The operation of the device stated briefly is as tollows:The device being secured to the edge ot a door as shown in Fig. 3, and the bell being wound up so as to place its operating spring under tension, the operating lever 25 will be prevented from moving to set the bell in operation by means of the stop 31 turned to the position shown in Figs. land 2. hen the door is closed the holdingfinger will be pressed toward the plate 10 by engagement with the door .irame 4.0, the end of the finger engaging the cam face 36 on the stop 31 and thereby turning the stop out of engagement with the lever arm 28, and the end of the holding finger 35' then coming into holding engagement with the end ottho lever arm and taking the place of the stop 81 in preventing operative movement of the actuating lever. The parts are thus brought to the position shown in 3 and will. so remain until. the door is open. By the opening of the door, the hplding finger 35 is released thereby releasing the lever arm 28 and allowing the operating lever to move under the pressure of its spring 30, whereby the push piece 12 of thebell will be moved by the lever arm 27 to set the bell in operation. The position taken bythe parts when the bell. has been this set in operation is shown in Fig. 4;. It will be seen that when the device has been. attached to the door and the stop 31 set to prevent the ringing of the bell as shown in Fig. 2, the further setting or the device for sounding the alarm when the dooris opened is accomplished merely by the act of closing the door, and the device will be thus set whether the door is closed from the inside or from the outside of the t am It will be understood that the invent-ion is not to be limited to the exact construction shown and to which the foregoing description has been mainly confined, but that it includes changes and modifications thereof within the claims.

Vi hat I claim is i. In an alarm device, the combination of a selfiringing bell, supporting means, means for attaching the supporting means to a door, a member tending to set the bell in operation, a holding device for preventing the operation of said member, and a movable device controlled in its movements by ongagement with the door frame during the opening and closing of the door to cause said holding device to move out of operative positi on when the door is closed and to permit said member to operate to set the bell in operation when the door is opened.

2. In a door alarm, the combination of a self-ringing bell, means tending to set the bell in operation, a holding device. for preventing the operation of said means, and a second holding device adapted tobe moved into position to prevent the operation of said means, the first said holding device being arranged to move out of operative position as the second said holding device is moved into operative position, and the second said holding device being arranged to move out of operative position to permit said means to operate, substantially as described.

3. In a door alarm, the combination of a self-ringing bell, aspring actuated member tending to set the bell in operation, a holding device for preventing operative movement of said member, and a second holding device adapted to be moved into operative position to prevent operative movement of said member and to cause said member to be released from the first said holding device, the second said holding device being arranged to move out of operative position to permit operative movement of said member, substantially as described.

4:. In a door alarm, the combination of a self-ringing bell, a spring actuated member tending to set the bell in operation, a holding device for preventing operative movement of said member, and a second holding device adapted to be moved into operative position to prevent operative movement of said member, and by its movement into op erative position to move the first said holding device out of operative position, the second said holding device being arranged to move out of operative position to permit operative movement of said member, substantially as described.

5. In a door alarm, the combination of a bell and means for ringing the bell, a holding device for preventing the ringing of the bell, and a second holding device for preventing the ringing of the bell adapted to be moved into operative position and by its movement into operative position to move the first said holding device out of operative position, the second said holding device being arranged to move out of operative position to permit the ringing of the bell, substantially as described.

6. In a door alarm, the combination of an alarm sounding device, a holding device for preventing the operation of the alarm sounding device, and a second holding device for preventing the operation of the alarm sounding device adapted to be moved into operative position, said holding devices being arranged to cause the first said holding device to move out of operative position as the second said holding device is moved into operative position, the second said holding device being arranged to move out of operative position to permit the alarm sounding device to operate, described.

7. The combination With an automatic bell 11 having a push piece 12 by movement of Which the bell is caused to operate, of the spring pressed operating lever 25 for moving the push piece 12, the stop 31 for preventing operative movement of the lever 25, and the holding finger 35 for preventing operative movement of the lever 25 and adapted When moved into holding position to move the stop 31 out of operative position, substantially as described.

In testimony whereof, I have hereunto set my hand, in the presence of tWo subscribing witnesses.

WESLEY TRAFFORD. Witnesses A. L. KENT, A. WHITE.

substantially as Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

